Fisker Inc. Fisker, a Californian electric vehicle (EV) company, is working on commercialising a solid-state battery-powered version of its luxury car. The founder Henrik Fisker is extremely vocal about solid-state batteries, sharing a picture on LinkedIn where it can be inferred that LLZO is used as electrolyte; given the yellowish disks seen in the picture are semi-transparent, it could be that Fisker is using a composite electrolyte, where LLZO provides the bulk conductivity, and a polymer matrix smooths out any issues related to grain boundaries. Fisker Inc.